before it was just the hellion, but I tested now, to be sure.
With my incredible paint skillz of doom I created an overview:
As you can see, it's still just the Hellion
cadaver same dmg as lurker, so useful xD
Well keep in mind, that this test was on single target and without additional rubies. So Cadaver hits aoe and does get boosted by the "Pestilence Herald" rubies normally. However mostly it just comes to single target in pve, therefore hellion is the more viable choice in almost any case. While in pvp cadaver can be useful, if you want to focus more on aoe than on single target.